Actually, it depends on body length. The animal with the longest intestine is a dolphin! That comes to more than 150m of the intestine. 🐬 The pet's intestine is much smaller. The average length in the dog 🐶 is 0.6 meters, and in the cat is 0.4 meters, i.e. 40 centimetres. 🐱
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Comparing with human digestion, the gastrointestinal transit time is six to eight hours for pets, while in people it’s between 20 and 30 hours.